In general, hand-sewing the skin will result in a better tummy tuck scar than stapling. There are a number of other factors that influence the ultimate appearance of a tummy tuck scar, including the placement of the incision, how much tension is on the skin (pulling in either direction), how many layers of stitches there are, the quality of the skin, and genetic and nutritional factors. A wide scar can occur with either type of closure. Staples can also leave "track marks" or little scars along the staple lines that can be temporary or permanent. [Just FYI, there are also absorbable staples that can be used for repairing the deep portion of the skin, which are placed below the skin surface and take the place of one layer of stitches.] In practice, I prefer to close my tummy tucks incisions in 3 hand-sewn layers, and have found this to leave an optimal scar. After surgery I like to monitor the healing and take steps to optimize the scar even further, such as silicone scar gel, silicone sheeting, or steroid injections if there is a raised scar. As you can see, the preoperative planning, intraoperative technique, and postoperative followup are all important factors influencing your ultimate scar, in addition to your own healing characteristics.